DRIVERS SIDE ELECTRICAL LOCKS AND WINDOWS

Both my driver's side lock and power window have stopped working. In 2006, my driver's side window stopped working and I took it to a mechanic who " tapped" the motor, allowing the window to work for almost a year before it quit working again. In 2009, the lock on the driver's side door stopped locking from the outside with remote. A couple days ago, my car's factory alarm system also stopped working (which was activated from the outside by remote), but the passenger door and back doors will still lock from the outside. I am a broke college kid, and am hoping to find a cheap repair, but I have a feeling this is going to cost way more than I would like.